The conclusion to Death by Ex-Girlfriend: War Cloud
Osamu Ashikaga and Tsukiakari Senkumo have died, and Bishamon, the mastermind behind their demise, still roams free. The peaceful house that Isabella, Yoko, Izanami, and Osamu once lived in has been reduced to just Yoko, with Isabella splitting away and Izanami going missing.
Even with Osamu dead, there is still a fight to be had, and justice to be served. War Cloud concludes here.
(Note: I would've combined this with the first part of War Cloud since it's so short, but it would've ruined the tension caused after the ending of the first part. Consider it all the same arc, just split for the sake of keeping the tension :D)